Remote Sensing Technology and Application, Volume. 39, Issue 1, 87(2024)

Study on Classification of Arbor Tree Species at Single Tree Scale based on Cross-modal Hybrid Fusion of UAV Point Cloud and Image

Min YAN1、*, Yonghua XIA1,2, Chong WANG3, Xiali KONG1, Haoyu TAI1, and Chen LI1
Author Affiliations
  • 1Faculty of Land Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China
  • 2City College,Kunming University of Science and Technology,Kunming 650051,China
  • 3Kunming Survey and Design Institute Co. ,Ltd. ,China Power Construction Group,Kunming 650200,China
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    To explore the application potential of airborne point cloud and UAV visible light image in tree species identification and classification, a single-tree scale tree species classification and recognition method based on UAV hybrid fusion of multi-modal features and decision was proposed. Firstly, Kendall Rank correlation coefficient method and Permutation Importance (PI) were used for feature selection, and Efficient Low-Rank Multi-Mode Fusion Algorithm (LMF) was used to fuse the selected point cloud and visible image features. Ensemble learning was introduced to input point cloud, image, and fusion features into eXtreme Gradient Boosting (XGBoost), Light Gradient Boosting Machine (LightGBM), and Random Forest (RF) base classifiers integrated by Stacking. Finally, the meta classifier, Naive Bayes, is used for decision fusion. The experimental data show that the independent test accuracy of the proposed algorithm is 99.4%, which improves 22.58% compared with the Random Forest classifier by traditional feature concatenate fusion. In addition, the Kappa coefficient also increased by 28.54%. The comparison experiment with Convolutional Neural Network(CNN) shows that the proposed algorithm has obvious advantages in small sample training and better generalization ability.

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    Min YAN, Yonghua XIA, Chong WANG, Xiali KONG, Haoyu TAI, Chen LI. Study on Classification of Arbor Tree Species at Single Tree Scale based on Cross-modal Hybrid Fusion of UAV Point Cloud and Image[J]. Remote Sensing Technology and Application, 2024, 39(1): 87

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    Paper Information

    Category: Research Articles

    Received: Jul. 20, 2022

    Accepted: --

    Published Online: Jul. 22, 2024

    The Author Email: YAN Min (1626020236@qq.com)

    DOI:10.11873/j.issn.1004-0323.2024.1.0087

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